[recipes] Fix a compiler warning

[Matthias Clasen <matthiasc src gnome org>]

commit a17bdfcf6f95af09761fb62adfa08baa83232c9a
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Feb 28 15:34:34 2017 -0500

    Fix a compiler warning
    
    The warning was -Wformat-nonliteral.

 src/gr-about-dialog.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/src/gr-about-dialog.c b/src/gr-about-dialog.c
index ffb1257..488263e 100644
--- a/src/gr-about-dialog.c
+++ b/src/gr-about-dialog.c
@@ -333,6 +333,8 @@ text_buffer_append (GtkTextBuffer *buffer,
         gtk_text_buffer_insert (buffer, &iter, text, -1);
 }
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wformat-nonliteral"
 static void
 text_buffer_append_printf (GtkTextBuffer *buffer,
                            const char    *format,
@@ -343,15 +345,14 @@ text_buffer_append_printf (GtkTextBuffer *buffer,
         int len;
 
         va_start (args, format);
-
         len = g_vasprintf (&buf, format, args);
         if (len >= 0) {
                 text_buffer_append (buffer, buf);
                 g_free (buf);
         }
-
         va_end (args);
 }
+#pragma GCC diagnostic pop
 
 static void
 text_buffer_append_link (GtkTextView *view,